Hey Duncan,
thank you very much for your quick reply.
_My data used:_
1st column(town):1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,...........,11
2nd column(year):1,2,3,4,5,6,7,8,9,10,11,12,1,2,3.......,12
3rd column (revenue):
4th colum (supply):
I have now renamed my colums and did the regression again. Now there is
a problem with R-squared, as it is the sum of 1 now with no given std.
error and t-value. This is probably due to the fact, that I try to
estimate more parameters than data.
To add a linear trend I found the following formular:*lm(y ~ x1 +
factor(ccode)*time, data=df)*
I try to I decode it for and use it for my regression: *plm(log(revenue)
~ log(supply) + factor(town)*time, data=R_Test_log_Neu)*
When I do this regression I will get the original error: "invalid type
(closure) for the variable 'time' - object specific trend"
With the notation"time" not my colum is meant, but probably the command
"time" in R.
Can you follow my thoughts?
Tobi
Am 11.05.2017 um 17:23 schrieb Duncan Murdoch:
Duncan Murdoch
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